da vs ould fella

da

noun

  • Father. 

  • Yes; an affirmative response. 

intj

  • Yes. 

  • A meaningless syllable used when singing a tune or indicating a rhythm. 

ould fella

noun

  • father 

  • old man 

How often have the words da and ould fella occurred in a corpus of books? (source: Google Ngram Viewer )